The pandemic, which has claimed more than 1.37 million lives worldwide, has offered the G-20 an opportunity to prove how such bodies can facilitate international co-operation in crises -- but has also underscored their shortcomings.

"The fact that Canada's fatality rate is at one per cent indicates that the health care system is not currently overwhelmed," Dr. Theresa Tam said.

The trade war between the United States and China, the killing of a Saudi journalist in the country's Istanbul Consulate and the conflict over Ukraine are likely to be on the agenda.

Refugees watching the riots from the relative safety of a falafel joint said the rioters were insane for destroying their tolerant adoptive city.

President's daughter Ivanka Trump had her own plan going into the G20 Summit.

G20 Summit protests in Toronto in 2010 resulted in Canada's largest mass detention.

Turkish President Tayyip Erdogan said on Monday he had urged world powers at a G20 meeting to set up a "safe zone" in Syria where there would be no fighting.

In his first event at the G20 leaders' summit Saturday, Justin Trudeau urged his peers to drive away anti-globalization and protectionist attitudes.